EP 1650874 A4 20060726 - VITERBI DECODER
Title (en)
VITERBI DECODER
Title (de)
VITERBI-DECODER
Title (fr)
DECODEUR DE VITERBI
Publication
Application
Priority
- JP 2004010981 W 20040726
- JP 2003280274 A 20030725
Abstract (en)
[origin: EP1650874A1] A Viterbi decoder capable of supporting a variety of constraint lengths and any arbitrary number of coefficients of a given estimated transmission path and composed of special hardware of small circuit scale. In the Viterbi decoder of the present invention, a branch metric calculation section (101) calculates the branch metrics of all paths from the state of the previous time to the state at the present time, selects the most probable path from the paths arriving at respective states based on the branch metrics (101a) and path metrics (103a) and outputs path select signal (102a) and path metric (102b). Path metric storage section (103) outputs path metric (103a) to be input to ACS calculation section (102) when performing ACS calculating at the next time. Path select signal temporary storage section (104) holds path select signal (102a) of n states, outputs path select signal (104a) of m states (m ‰¦ n) and changes a bit input position according to the encoding constraint length or the number of coefficient of deduced estimated transmission path of the system which performs Viterbi decoding.
IPC 8 full level
G06F 11/10 (2006.01); H03M 13/41 (2006.01); H04L 1/00 (2006.01)
CPC (source: EP US)
H03M 13/41 (2013.01 - EP US); H03M 13/4107 (2013.01 - EP US); H03M 13/413 (2013.01 - EP US); H03M 13/4161 (2013.01 - EP US); H03M 13/4169 (2013.01 - EP US); H03M 13/4192 (2013.01 - EP US); H03M 13/6337 (2013.01 - EP US); H03M 13/6502 (2013.01 - EP US); H03M 13/6516 (2013.01 - EP US); H03M 13/6561 (2013.01 - EP US); H04L 1/0054 (2013.01 - EP US); H03M 13/23 (2013.01 - EP US)
Citation (search report)
- [Y] EP 1017180 A2 20000705 - NEC CORP [JP]
- [Y] US 2002040462 A1 20020404 - SAWAGUCHI HIDEKI [JP], et al
- [A] US 6333954 B1 20011225 - HANSQUINE DAVID [US]
- See references of WO 2005011129A1
Designated contracting state (EPC)
DE FR GB
DOCDB simple family (publication)
EP 1650874 A1 20060426; EP 1650874 A4 20060726; CN 1830151 A 20060906; JP 2005045727 A 20050217; US 2006209995 A1 20060921; US 7277507 B2 20071002; WO 2005011129 A1 20050203
DOCDB simple family (application)
EP 04748140 A 20040726; CN 200480021639 A 20040726; JP 2003280274 A 20030725; JP 2004010981 W 20040726; US 56537704 A 20040726